A communication terminal device is provided, including: a transceiver configured to communicate with a communication device in accordance with an uplink resource allocation; a determiner configured to determine a desired power consumption for data transmissions from the communication terminal device to the communication device, and to determine a suitable uplink resource allocation based on the desired power consumption; and a controller configured to determine a communication behavior of the communication terminal device with the communication device based on the suitable uplink resource allocation and to control the transceiver according to the determined communication behavior.